Produção Nacional
Revisado por pares
Células sanguíneas e resposta hematológica de Oxydoras niger(Pisces, Doradidae) oriundos da bacia do médio Rio Solimões, Estado do Amazonas (Brasil), naturalmente parasitados
2010; INSTITUTO DE PESCA - APTA - SEC. DE AGR. E ABAST. - SP; Volume: 36; Issue: 4 Linguagem: Inglês
ISSN
1678-2305
AutoresRayla Beatriz da Silva Santos, Marcos Tavares‐Dias,
Tópico(s)Parasite Biology and Host Interactions
ResumoThe Oxydoras niger Valenciennes, 1821 (Doradidae) is an endemic fish from the South America rivers basins (Amazonas, Sao Francisco, Essequipo and Orinoco Rivers) that is used as food by some Amazon people. The aim of this work was to study the effects of parasitism by protozoans and metazoans in the hemogram and the leukocytes features of O. niger collected in the Solimoes River basin, Amazonas State, Brazil. Fish (70.3%) were parasitized by Ichthyophthirius multifiliis (Protozoa), Chilodonella sp. (Protozoa), Cosmetocleithrum spp. (Monogenoidea), Paracavisona impudica (Acanthocephala), Cucullanus grandistomis (Nematoda), Digenea and Cestoda, but the highest abundance was of monogenoideans species. This association of parasites caused a significant (p<0.05) increase in hemoglobin concentration and mean corpuscular hemoglobin concentration (MCHC). In blood smears of parasitized and non-parasitized fish were found lymphocytes, monocytes, neutrophils, PAS-positive granular leukocytes (PAS-GL) and eosinophils, but only neutrophils had its increase influenced by parasitism, while lymphocytes had a significant (p<0.05) decrease. This was the first study on blood parameters of O. niger in Amazon and the results may be used for comparison in others studies about this fish species
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